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Cadillac XT5 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
16406251) - 2023 - CRC - 3/28/22
Vehicle Care
355
3. Fill the coolant surge tank
with the proper mixture to
the mark pointed to on the
front of the coolant
surge tank.
4. With the coolant surge
tank pressure cap off,
start the engine and let it
run until you can feel the
upper radiator hose
getting hot. Watch out for
the engine cooling fans. By
this time, the coolant level
inside the coolant surge
tank may be lower. If the
level is lower, add more of
the proper mixture to the
coolant surge tank until
the level reaches the mark
pointed to on the front of
the coolant surge tank.
5. Replace the pressure cap
tightly.
6. Verify coolant level after
the engine is shut off and
the coolant is cold.
If necessary, repeat
coolant fill procedure
Step 1
–
6.
Caution
If the pressure cap is not
tightly installed, coolant loss
and engine damage may
occur. Be sure the cap is
properly and tightly secured.
Automatic Coolant
Service Fill Instructions
(2.0L Engine Only)
If equipped, this feature
assists in filling and removing
air from the cooling system
after service of components
or when coolant is added after
being too low.
To activate the fill and air
removal process:
1. With a cold system,
disconnect the vent line
from the port near the cap
on the surge tank. Add
coolant to the indicated
mark on the surge tank.
2. Reconnect the vent line to
the surge tank and replace
the cap on the surge tank.
3. Connect the vehicle to a
battery charger.
4. Put the vehicle in Service
Mode. See Ignition
Positions